A 2.0 V capacitive device derived from shape-preserved metal nitride nanorods

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

19 Scopus Citations
View graph of relations

Author(s)

  • Changrong Zhu
  • Yanfeng Sun
  • Dongliang Chao
  • Xinghui Wang
  • Peihua Yang
  • Xiao Zhang
  • Hui Huang
  • Hong Jin Fan

Detail(s)

Original languageEnglish
Pages (from-to)1-6
Journal / PublicationNano Energy
Volume26
Online published5 May 2016
Publication statusPublished - Aug 2016
Externally publishedYes

Abstract

A high working voltage and fast charging/discharging capability are important to a supercapacitor device in order to achieve decent energy densities with high power. In this work, we report 2.0 V quasi-solid-state symmetric capacitive device based on Fe2N-Ti2N (FTN) core-shell nanorod array electrodes. Through a surface protection by a thin and ultra-stable Ti2N shell, Fe2N converted from its oxyhydroxide precursor inhibits the original nanorod structure. Due to advantageous features of these core-shell metal nitride electrodes (e.g., high conductivity, structure stability, direct current path), the symmetric device permits ultrahigh scan rates (up to 50 V s-1) and delivers fairly stable capacitance in long-term cycles (~82 F g-1 with ~99% capacitance retention in 20,000 cycles). As a result, the supercapacitor exhibits an impressive energy density of ~48.5 W h kg-1 at the power of 2700 W kg-1. These results demonstrate the potentialities of metal nitride nanorods array for high energy density capacitive device.

Research Area(s)

  • Atomic layer deposition, Electrochemical capacitor, High working voltage, Metal nitride, Symmetric supercapacitor

Citation Format(s)

A 2.0 V capacitive device derived from shape-preserved metal nitride nanorods. / Zhu, Changrong; Sun, Yanfeng; Chao, Dongliang; Wang, Xinghui; Yang, Peihua; Zhang, Xiao; Huang, Hui; Zhang, Hua; Fan, Hong Jin.

In: Nano Energy, Vol. 26, 08.2016, p. 1-6.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review